Bark-stripping machine.



JLKo'KKo. BARR STRIPPING MACHINE.

APPLIUATION FILI-2D AUG. 10, 1911.

Patented Apr. 23, 1912.

Awa/ggg d @7mm @MmZC-V fn JOI-IN KOKKO, 0F ELLIS BAY, QUEBEC, CANADA.

BARK-STRIPPING MACHINE.

Specicaton of Letters Patent.

Application filed August 10, 1911.

Patented Apr. 23, 1912. serial No. 643,280.

To all '207mm t may concern.'

Be it known thatl I, JOHN KoKKo, resident of the town of Ellis Bay, Anticosti Island, in the Province of Quebec, Dominion of Canada, a citizen of Finland, have invented certain new and useful Improvements in Bark-Stripping Machines; and I do hereby declare that the *following is a full, clear, and exact description of the same.

The invention relates to improvements in bark stripping machines, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel means employed whereby the log is longitudinally moved through a plurality of radially arranged guides and a plurality of knives supported at one end of said guides.

The object of the invention is to devise a simple and cheap machine which may be adjusted in a very easy manner for dien ent thicknesses of logs and at the same time operated quickly so as to increase the output customary in that class of machine, and generally to provide a serviceable and eilicient stripper.

In the drawings, Figure 1 is a longitudinal sectional view of the machine. Fig. 2 is a cross sectional view on the line A-B in Fig. 1.

Like numerals of reference indicate corresponding parts in each gure.

Referring to the drawings, 1 and 2 are the end standards, the standard 1 having the plunger opening 3 and the standard 2 having the central delivery opening 4.

5 are radial beams extending bet-Ween the standards" 1 and 2 and slidably secured to said standards.

6 is a radial beam, having the longitudinal opening 7 through which the logs are fed into the central space at the edge of which each beam terminates inwardly.

8 are substantially oval recesses, cut from the inner edge of every second beam and leaning toward the standard 2. 9 are similarly formed recesses in the remaining beams and leaning toward the standard 2, but'nearer to said standard.

1() are knives rigidly secured to the inner edge of the radial beams between the recesses 8 and the standard 2, said knives having arc shaped cutting edges. 11 are knives rigidly secured to the said radial beams between the recesses 9 and the standard 2 and having arc-shaped cutting edges, adapted to extend between, and overlap at each side, the arc-shaped cutting edges of the knives 10, though behind said knives, thereby insuring the complete circle of cutting edges.

12 are beams in radial alinement with the beams 5 and 6 and rigidly secured in the Standards 1 and 2 at the outer side of the said beams 5 and 6.

13 are bearings rigidly secured to the beams 12.

14 are longitudinal shafts journaled in the bearings 13 and at one end extending beyond the standard 1.

15 are pinions iixedly mounted 'on the shafts 14, one adjacent .to one end of each of said shafts and the other adjacent to the other end of each of said shafts and prefery ably turning in lateral grooves in the beams 12.

16 are racks rigidly secured to the beams 5 and 6 and extending laterally therefrom into the lateral grooves in the beams 12 between the pinions 15 and the beds of said grooves and coacting with said pinions.

17 are helical springs encircling the rack 16 between the beams 12 and the beams 5 and 6 and exerting a regulating inward pressure on the beams 5 and 6.

18 are helical springs, at the ends of the slide-ways formed in the standards 1 and 2 for the radial beams 5 and 6 and exerting an inward pressure on the said beams 5 and 6, thus it will be seen that the tendency of the beams 5 and 6 is to hold close to the log in the center between the inner edges of said beams, but this is more positively controlled by the racks and pinions by means of which the beams are operated in an inward or outward direction in their slide-ways in the said standards.

19 are pinions mounted on the ends of the shafts 14 to the outside of the standard 1.

20 is a sleeve rigidly secured in the plunger opening 3.

21 is a gear wheel loosely mounted on the sleeve 20 and here shown as suitably connected with a pulley 22, though the said gear wheel may be operated in any suitable manner. The gear wheel 21 coacts with the pinions 19 and turns the shafts 14, in consequence sliding the radial beams 5 and 6 inwardly or outwardly as the case may be by means of the racks 16 traveling under said pinions 15.

23 is a plunger extending through the sleeve 20 and driving outwardly and inwardly through said sleeve and through the log space between the beams 5 and 6, in any suitable manner, as the means for operating this plunger is no part of this invention.

In the operation of the machine, the logs are rolled down a suitable chute to the feed opening 7 where they drop into the space formed between the inner edges of the radial beams 5 and 6, said beams 5 and 6 are then quickly operated by means of the gear 21, until their inner edges close up to the log. The plunger 23 is then operated which drives the log forwardly and into contact with the knives 10 and 11, said knives completely encircling said log and stripping off the bark, as the cutting edge of the knife naturally projects inwardly farther than the inmost longitudinal edges of the beams 5 and 6. The log is pushed through these knives, by the plunger, out of the delivery opening 4.

What I claim as my invention is:

1. In a bark stripping machine, a plurality of inwardly slidable radial knife supports, forming guides for the logs and recessed toward one end thereof, knives lixedly secured to the inner edges of said supports beyond said recesses, standards at each end of said supports, and means for sliding said knife supports inwardly and outwardly in a radial direction.

2. In a bark stripping machine, the combination with a pair of standards having central openings therethrough, of a plurality of longitudinal beams forming knife supports and radially and slidably secured in said standards,one of said beams having a feed opening therethrough and all of said beams having recesses toward one end thereof, fixed knives having arc-shaped cutting edges secured to said beams beyond said recesses, radial beams secured in said standards outside of the aforesaid beams and in alinement therewith, and means supported by said outer beams for sliding said inner beams inwardly and outwardly.

3. In a bark stripping machine, the combination with a pair of standards having central openings therethrough, of a plurality of radial beams slidably arranged in said standards, one of said beams having a longitudinal feed opening therethrough and every second beam having a recess from the inner edge thereof and every other second beam having a recess from the inner edge thereof nearer to one of said standards, knives iXedly secured beyond said recesses to the inner edges of said beams and having arc-shaped cutting faces, one set of said knives being behind another set and overlapping in circumferential arrangement, and means for sliding said beams inwardly and outwardly.

1. In a bark stripping machine, the combination with a pair of standards, of a plurality of radial beams slidably arranged in said standards, knives supported by said beams toward one end thereof, racks rigidly secured and extending laterally from said beams, rigid beams secured to said standards in alinement with the aforesaid beams, bearings supported by said rigid beams, shafts journaled in said bearings, pinions fixedly secured on said shaft coacting with said racks, and means for coincidently turning all of said shafts.

5. In a bark stripping machine, the combination with a pair of standards, of a plurality of radially arranged beams slidably secured in said standards, knives fiXedly secured to said beams, racks extending laterally from the outer edges of said beams, rigid beams secured in said standards in radial alinement with the aforesaid beams, bearings secured to said rigid beams, shafts journaled in said bearings and extending at one end beyond the standard, pinions fixedly secured on said shafts and coacting with said racks, pinions secured at the ends of said shafts beyond said standard, a hollow bearing secured in one of said standards, a gear wheel turning on said bearing and engaging said pinions beyond the standard, and means for turning said gear wheel.

G. In a bark stripping machine, the combination with a pair of standards, of a plurailty of radially arranged beams slidably secured in said standards, knives fiXedly secured to said beams, racks extending laterally from the outer edges of said beams, rigid beams secured in said standards in radial alinement with the aforesaid beams, bearings secured to said rigid beams, shafts journaled in said bearings and extending at one end beyond the standard, pinions iXedly secured on said shafts and coacting with said racks, pinions secured at the ends of said shafts beyond said standard, a hollow bearing secured in one of said standards, a gear wheel turning on said bearing and engaging said pinions beyond the standard, springs encircling said racks between said rigid beams and said slidable beams, and means for turning said gear wheel.

Signed at Ellis Bay, Island of Anticosti, this eleventh day of July, 1911.

J OI-IN KOKKO. Witnesses:

ALF. MALOIUND, T. FOURNIER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, ID. C. 

